added classes for each piece, with possible moves. Also updated board initialization to include all pieces.

src/Bishop.java

@@ -0,0 +1,18 @@
+import java.util.ArrayList;
+
+public class Bishop extends Piece {
+    public Bishop(boolean black) {
+        super(black);
+    }
+
+    public ArrayList<BoardCoordinate> getPossibleMoves(BoardCoordinate position) {
+        ArrayList<BoardCoordinate> possibleMoves = new ArrayList<>();
+        for(int i = 1; i <= 7; i++) {
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y + i));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y + i));
+        }
+        return possibleMoves;
+    }
+}

src/Board.java

@@ -40,10 +40,28 @@ public class Board {
         board = new Piece[BOARD_SIZE][BOARD_SIZE];
 
         // Initialize pieces
-        set(1, 0, new Knight(true));
-        set(6, 0, new Knight(true));
-        set(1, 7, new Knight(false));
-        set(6, 7, new Knight(false));
+        for(int i = 0; i <= 7; i++){
+            if(i == 0 || i == 7){
+                for(int j = 0; j <= 7; j++){
+                    if(j == 0 || j == 7){
+                        set(j, i, new Rook(i==0));
+                    } else if(j == 1 || j == 6){
+                        set(j, i, new Knight(i==0));
+                    } else if(j == 2 || j == 5){
+                        set(j, i, new Bishop(i==0));
+                    } else if(j == 4){
+                        set(j, i, new Queen(i==0));
+                    } else {
+                        set(j, i, new King(i==0));
+                    }
+                }
+            }
+            if(i == 1 || i == 6){
+                for(int j = 0; j <= 7; j++){
+                    set(j, i, new Pawn(i==1));
+                }
+            }
+        }
     }
 
     public boolean outOfBounds(int x, int y) {

src/King.java

@@ -0,0 +1,20 @@
+import java.util.ArrayList;
+
+public class King extends Piece {
+    public King(boolean black) {
+        super(black);
+    }
+
+    public ArrayList<BoardCoordinate> getPossibleMoves(BoardCoordinate position) {
+        ArrayList<BoardCoordinate> possibleMoves = new ArrayList<>();
+        possibleMoves.add(new BoardCoordinate(position.x - 1, position.y - 1));
+        possibleMoves.add(new BoardCoordinate(position.x - 1, position.y + 1));
+        possibleMoves.add(new BoardCoordinate(position.x - 1, position.y));
+        possibleMoves.add(new BoardCoordinate(position.x + 1, position.y - 1));
+        possibleMoves.add(new BoardCoordinate(position.x + 1, position.y + 1));
+        possibleMoves.add(new BoardCoordinate(position.x + 1, position.y));
+        possibleMoves.add(new BoardCoordinate(position.x, position.y + 1));
+        possibleMoves.add(new BoardCoordinate(position.x, position.y - 1));
+        return possibleMoves;
+    }
+}

src/Pawn.java

@@ -0,0 +1,17 @@
+import java.util.ArrayList;
+
+public class Pawn extends Piece {
+    public Pawn(boolean black) {
+        super(black);
+    }
+
+    public ArrayList<BoardCoordinate> getPossibleMoves(BoardCoordinate position) {
+        ArrayList<BoardCoordinate> possibleMoves = new ArrayList<>();
+        if (this.black) {
+            possibleMoves.add(new BoardCoordinate(position.x, position.y + 1));
+        } else {
+            possibleMoves.add(new BoardCoordinate(position.x, position.y - 1));
+        }
+        return possibleMoves;
+    }
+}

src/Queen.java

@@ -0,0 +1,22 @@
+import java.util.ArrayList;
+
+public class Queen extends Piece {
+    public Queen(boolean black) {
+        super(black);
+    }
+
+    public ArrayList<BoardCoordinate> getPossibleMoves(BoardCoordinate position) {
+        ArrayList<BoardCoordinate> possibleMoves = new ArrayList<>();
+        for(int i = 1; i <= 7; i++) {
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y + i));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y + i));
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y));
+            possibleMoves.add(new BoardCoordinate(position.x, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x, position.y + i));
+        }
+        return possibleMoves;
+    }
+}

src/Rook.java

@@ -0,0 +1,18 @@
+import java.util.ArrayList;
+
+public class Rook extends Piece {
+    public Rook(boolean black) {
+        super(black);
+    }
+
+    public ArrayList<BoardCoordinate> getPossibleMoves(BoardCoordinate position) {
+        ArrayList<BoardCoordinate> possibleMoves = new ArrayList<>();
+        for(int i = 1; i <= 7; i++) {
+            possibleMoves.add(new BoardCoordinate(position.x - i, position.y));
+            possibleMoves.add(new BoardCoordinate(position.x + i, position.y));
+            possibleMoves.add(new BoardCoordinate(position.x, position.y - i));
+            possibleMoves.add(new BoardCoordinate(position.x, position.y + i));
+        }
+        return possibleMoves;
+    }
+}